Expanded jack tube



FIG. 1 is a perspective view of an expanded jack tube showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is an opposite side elevational view thereof.

The broken lines are for environmental purposes only and do not form a part of the claimed design. 

The ornamental design for an expanded jack tube, as shown and described. 